Columba or Colmcille was an Irish abbot and missionary credited with spreading Christianity at the start of the Hiberno-Scottish mission in what became Scotland. He founded the important abbey on Iona
Saint Columba, Apostle to the Picts
Ruins of Colmcille's Chapel at Gartan Lough
Stained-glass window of Colmcille founding Derry
Nineteenth century illustration of Columba's meeting with King Bridei, by William Hole
Brendan of Birr was one of the early Irish monastic saints. He was a monk and later an abbot, of the 6th century. He is known as "Saint Brendan the Elder" to distinguish him from his contemporary and
Stained glass window depicting Brendan in St. Brendan's Church, Birr.